Remove special-case treatment of all-zeroes MAC address, per today's discussion in pgsql-general.
Remove special-case treatment of all-zeroes MAC address, per today's
discussion in pgsql-general.

rvs/gpdb,chrishajas/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,rvs/gpdb,50wu/gpdb,xuegang/gpdb,rvs/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,xinzweb/gpdb,zaksoup/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,royc1/gpdb,randomtask1155/gpdb,Chibin/gpdb,50wu/gpdb,50wu/gpdb,ovr/postgres-xl,tpostgres-projects/tPostgres,0x0FFF/gpdb,zaksoup/gpdb,ahachete/gpdb,janebeckman/gpdb,kaknikhil/gpdb,atris/gpdb,tpostgres-projects/tPostgres,snaga/postgres-xl,cjcjameson/gpdb,zaksoup/gpdb,yazun/postgres-xl,cjcjameson/gpdb,0x0FFF/gpdb,atris/gpdb,rubikloud/gpdb,50wu/gpdb,0x0FFF/gpdb,yazun/postgres-xl,foyzur/gpdb,kaknikhil/gpdb,tangp3/gpdb,lisakowen/gpdb,ahachete/gpdb,xuegang/gpdb,ahachete/gpdb,atris/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,cjcjameson/gpdb,rubikloud/gpdb,arcivanov/postgres-xl,adam8157/gpdb,ovr/postgres-xl,kaknikhil/gpdb,royc1/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,foyzur/gpdb,rvs/gpdb,0x0FFF/gpdb,foyzur/gpdb,chrishajas/gpdb,xuegang/gpdb,pavanvd/postgres-xl,janebeckman/gpdb,yuanzhao/gpdb,lintzc/gpdb,50wu/gpdb,tangp3/gpdb,Postgres-XL/Postgres-XL,ashwinstar/gpdb,edespino/gpdb,oberstet/postgres-xl,techdragon/Postgres-XL,lintzc/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,oberstet/postgres-xl,cjcjameson/gpdb,Quikling/gpdb,kmjungersen/PostgresXL,50wu/gpdb,cjcjameson/gpdb,janebeckman/gpdb,adam8157/gpdb,edespino/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,royc1/gpdb,Quikling/gpdb,xuegang/gpdb,rubikloud/gpdb,snaga/postgres-xl,cjcjameson/gpdb,ashwinstar/gpdb,zaksoup/gpdb,Quikling/gpdb,50wu/gpdb,Chibin/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,rubikloud/gpdb,0x0FFF/gpdb,zaksoup/gpdb,rubikloud/gpdb,greenplum-db/gpdb,atris/gpdb,yuanzhao/gpdb,rvs/gpdb,atris/gpdb,arcivanov/postgres-xl,kmjungersen/PostgresXL,xinzweb/gpdb,Chibin/gpdb,rvs/gpdb,greenplum-db/gpdb,xuegang/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,royc1/gpdb,greenplum-db/gpdb,janebeckman/gpdb,xuegang/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,50wu/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,cjcjameson/gpdb,postmind-net/postgres-xl,greenplum-db/gpdb,jmcatamney/gpdb,ahachete/gpdb,edespino/gpdb,yuanzhao/gpdb,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,postmind-net/postgres-xl,CraigHarris/gpdb,kmjungersen/PostgresXL,royc1/gpdb,zaksoup/gpdb,Chibin/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,lintzc/gpdb,arcivanov/postgres-xl,Quikling/gpdb,CraigHarris/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,foyzur/gpdb,xuegang/gpdb,Chibin/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,ahachete/gpdb,xuegang/gpdb,randomtask1155/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,lintzc/gpdb,yuanzhao/gpdb,lintzc/gpdb,jmcatamney/gpdb,pavanvd/postgres-xl,zeroae/postgres-xl,chrishajas/gpdb,royc1/gpdb,lintzc/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,randomtask1155/gpdb,CraigHarris/gpdb,postmind-net/postgres-xl,janebeckman/gpdb,snaga/postgres-xl,Postgres-XL/Postgres-XL,royc1/gpdb,Quikling/gpdb,atris/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,ahachete/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,lpetrov-pivotal/gpdb,techdragon/Postgres-XL,snaga/postgres-xl,ovr/postgres-xl,atris/gpdb,Chibin/gpdb,pavanvd/postgres-xl,edespino/gpdb,zeroae/postgres-xl,rvs/gpdb,Quikling/gpdb,foyzur/gpdb,xinzweb/gpdb,greenplum-db/gpdb,lisakowen/gpdb,kaknikhil/gpdb,rubikloud/gpdb,janebeckman/gpdb,tangp3/gpdb,janebeckman/gpdb,chrishajas/gpdb,ahachete/gpdb,rubikloud/gpdb,ovr/postgres-xl,zeroae/postgres-xl,yuanzhao/gpdb,Chibin/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,lisakowen/gpdb,oberstet/postgres-xl,yazun/postgres-xl,jmcatamney/gpdb,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,CraigHarris/gpdb,lpetrov-pivotal/gpdb,xinzweb/gpdb,atris/gpdb,foyzur/gpdb,xinzweb/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,randomtask1155/gpdb,tangp3/gpdb,lisakowen/gpdb,zaksoup/gpdb,zaksoup/gpdb,Chibin/gpdb,adam8157/gpdb,Quikling/gpdb,ahachete/gpdb,foyzur/gpdb,foyzur/gpdb,rubikloud/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,edespino/gpdb,Chibin/gpdb,CraigHarris/gpdb,edespino/gpdb,Quikling/gpdb,adam8157/gpdb,jmcatamney/gpdb,lintzc/gpdb,yazun/postgres-xl,kaknikhil/gpdb,oberstet/postgres-xl,adam8157/gpdb,lintzc/gpdb,lintzc/gpdb,edespino/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,tangp3/gpdb,snaga/postgres-xl,lisakowen/gpdb,chrishajas/gpdb,chrishajas/gpdb,randomtask1155/gpdb,royc1/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,kaknikhil/gpdb,chrishajas/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,kmjungersen/PostgresXL,xuegang/gpdb,rvs/gpdb,zeroae/postgres-xl,yuanzhao/gpdb,janebeckman/gpdb,oberstet/postgres-xl,edespino/gpdb,chrishajas/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,Quikling/gpdb,adam8157/gpdb,xinzweb/gpdb,edespino/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,rvs/gpdb,tangp3/gpdb,edespino/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,techdragon/Postgres-XL,yazun/postgres-xl,Chibin/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,lpetrov-pivotal/gpdb,xinzweb/gpdb,rvs/gpdb